The Great Belt ( da, Storebælt, ) is a

strait A strait is an oceanic landform connecting two seas or two other large areas of water. The surface water generally flows at the same elevation on both sides and through the strait in either direction. Most commonly, it is a narrow ocean channe ...

between the major islands of

Zealand Zealand ( da, Sjælland ) at 7,031 km2 is the largest and most populous island in Denmark proper (thus excluding Greenland and Disko Island, which are larger in size). Zealand had a population of 2,319,705 on 1 January 2020. It is the 1 ...

(''Sjælland'') and

Funen Funen ( da, Fyn, ), with an area of , is the third-largest island of Denmark, after Zealand and Vendsyssel-Thy. It is the 165th-largest island in the world. It is located in the central part of the country and has a population of 469,947 as of ...

(''Fyn'') in

Denmark ) , song = ( en, "King Christian stood by the lofty mast") , song_type = National and royal anthem , image_map = EU-Denmark.svg , map_caption = , subdivision_type = Sovereign state , subdivision_name = Danish Realm, Kingdom of Denmark ...

. It is one of the three

Danish Straits The Danish straits are the straits connecting the Baltic Sea to the North Sea through the Kattegat and Skagerrak. Historically, the Danish straits were internal waterways of Denmark; however, following territorial losses, Øresund and Fehmarn Be ...

. Effectively dividing Denmark in two, the Belt was served by the

Great Belt ferries The Great Belt ferries ( da, Storebæltsfærgerne) were the train and car ferries operating across the Danish strait of Great Belt, between the islands of Zealand and Funen. The railway ferry link was established in 1883, while automobile-only ferr ...

from the late 19th century until the islands were connected by the

Great Belt Fixed Link The Great Belt Bridge ( da, Storebæltsbroen) or Great Belt fixed link ( da, Storebæltsforbindelsen) is a multi-element fixed link crossing the Great Belt strait between the Danish islands of Zealand and Funen. It consists of a road suspension ...

in 1997–98.

Geography

The Great Belt is the largest and most important of the three

that connect the

Baltic Sea The Baltic Sea is an arm of the Atlantic Ocean that is enclosed by Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Poland, Russia, Sweden and the North and Central European Plain. The sea stretches from 53°N to 66°N latitude and from ...

to the

Kattegat The Kattegat (; sv, Kattegatt ) is a sea area bounded by the Jutlandic peninsula in the west, the Danish Straits islands of Denmark and the Baltic Sea to the south and the provinces of Bohuslän, Västergötland, Halland and Skåne in Sweden ...

strait and

Atlantic Ocean The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe ...

. The others are the

Øresund Øresund or Öresund (, ; da, Øresund ; sv, Öresund ), commonly known in English as the Sound, is a strait which forms the Danish–Swedish border, separating Zealand (Denmark) from Scania (Sweden). The strait has a length of ; its width v ...

and the

Little Belt The Little Belt (, ) is a strait between the island of Funen and the Jutland Peninsula in Denmark. It is one of the three Danish Straits that drain and connect the Baltic Sea to the Kattegat strait, which drains west to the North Sea and Atlant ...

straits. The Great Belt is long and wide. It flows around two major islands:

Samsø Samsø (Anglicized: "Samso" or "Samsoe") is a Denmark, Danish island in the Kattegat off the Jutland Peninsula. Samsø is located in Samsø municipality. The community has 3,724 inhabitants (2017) (January 2010:4,010) called ''Samsings'' and is ...

in the north and

Langeland Langeland (, ) is a Danish island located between the Great Belt and Bay of Kiel. The island measures 285 km2 (c. 110 square miles) and, as of 1 January 2018, has a population of 12,446.

to the south. At

Sprogø Sprogø () is a small Danish island, located in the Great Belt, the strait that separates the main islands of Funen and Zealand. It is about halfway across the strait, from the Zealand shore and from the Funen shore. Although ''sprog'' is mode ...

the Great Belt divides into the East Channel and the West Channel. Both are traversed by the

, but a tunnel also runs under the East Channel.

Geology

In pre-glacial times a river, which the Baltic Sea basin then contained and which geologists call the Eridanos, must have passed near the region as the rise of South Swedish Dome in

Neogene The Neogene ( ), informally Upper Tertiary or Late Tertiary, is a geologic period and system that spans 20.45 million years from the end of the Paleogene Period million years ago ( Mya) to the beginning of the present Quaternary Period Mya. ...

times diverted it south from its previous path across central Sweden. The Great Belt originated as Dana River that was eroded into existence 9000–8900 years ago when

post-glacial rebound Post-glacial rebound (also called isostatic rebound or crustal rebound) is the rise of land masses after the removal of the huge weight of ice sheets during the last glacial period, which had caused isostatic depression. Post-glacial rebound a ...

made the

Ancylus Lake Ancylus Lake is a name given by geologists to a large freshwater lake that existed in northern Europe approximately from 9500 to 8000 years B.C being in effect one of various predecessors to the modern Baltic Sea. Origin, evolution and demise The ...

that occupied the Baltic depression lose its outlets around

Gothenburg Gothenburg (; abbreviated Gbg; sv, Göteborg ) is the second-largest city in Sweden, fifth-largest in the Nordic countries, and capital of the Västra Götaland County. It is situated by the Kattegat, on the west coast of Sweden, and has ...

tipping over in the south. The forming of the Dana River is thought to have caused a dramatic erosion of sediments,

peat Peat (), also known as turf (), is an accumulation of partially decayed vegetation or organic matter. It is unique to natural areas called peatlands, bogs, mires, moors, or muskegs. The peatland ecosystem covers and is the most efficien ...

lands and forests along its way. This led initially to a relatively rapid fall in the lake level over hundreds of years to then continue falling at a lower pace.

Rising sea levels Rising may refer to: * Rising, a stage in baking - see Proofing (baking technique) *Elevation * Short for Uprising, a rebellion Film and TV * "Rising" (''Stargate Atlantis''), the series premiere of the science fiction television program ''Starga ...

allowed the sea to break through the Dana River forming the Great Belt as a proper seaway. In the processes the Ancylus Lake became the

Littorina Sea Littorina Sea (also Litorina Sea) is a geological brackish water stage of the Baltic Sea, which existed around 7500–4000 BP and followed the Mastogloia Sea, a transitional stage of the Ancylus Lake. This stage and form of the body of wat ...

as salt water entered the Baltic depression.

Biology

The Great Belt is home to some popular fish:

flatfish A flatfish is a member of the Ray-finned fish, ray-finned demersal fish order (biology), order Pleuronectiformes, also called the Heterosomata, sometimes classified as a suborder of Perciformes. In many species, both eyes lie on one side of the ...

sea trout Sea trout is the common name usually applied to anadromous (sea-run) forms of brown trout (''Salmo trutta''), and is often referred to as ''Salmo trutta'' morpha ''trutta''. Other names for anadromous brown trout are sewin (Wales), peel or peal ...

Atlantic cod The Atlantic cod (''Gadus morhua'') is a benthopelagic fish of the family Gadidae, widely consumed by humans. It is also commercially known as cod or codling.Atlantic mackerel The Atlantic mackerel (''Scomber scombrus''), also known as Boston mackerel, Norwegian mackerel, Scottish mackerel or just mackerel, is a species of mackerel found in the temperate waters of the Mediterranean Sea, the Black Sea, and the northern ...

and

garfish The garfish (''Belone belone''), also known as the garpike or sea needle, is a pelagic, oceanodromous needlefish found in brackish and marine waters of the Atlantic Ocean and the Mediterranean, Caribbean, Black, and Baltic Seas. Description Th ...

, which are fished avidly for sport and for sale. A large and rising population of

harbour porpoise The harbour porpoise (''Phocoena phocoena'') is one of eight extant species of porpoise. It is one of the smallest species of cetacean. As its name implies, it stays close to coastal areas or river estuaries, and as such, is the most familiar ...

s lives in the Belts.

International waterway

The Great Belt was historically navigable to ocean-going vessels. It still is used, despite a few collisions and near collisions with the

Great Belt Bridge The Great Belt Bridge ( da, Storebæltsbroen) or Great Belt fixed link ( da, Storebæltsforbindelsen) is a multi-element fixed link crossing the Great Belt strait between the Danish islands of Zealand and Funen. It consists of a road suspension ...

. The

Danish navy The Royal Danish Navy ( da, Søværnet) is the sea-based branch of the Danish Defence force. The RDN is mainly responsible for maritime defence and maintaining the sovereignty of Danish territorial waters (incl. Faroe Islands and Greenland). Oth ...

monitors maritime traffic in the waters around the Great Belt. In the reign of king

Eric of Pomerania Eric of Pomerania (1381 or 1382 – 24 September 1459) was the ruler of the Kalmar Union from 1396 until 1439, succeeding his grandaunt, Queen Margaret I. He is known as Eric III as King of Norway (1389–1442), Eric VII as King of Denmark (1396 ...

the Danish government began to receive a large part of its income from the so-called '

Sound Dues The Sound Dues (or Sound Tolls; da, Øresundstolden) were a toll on the use of the Øresund, or "Sound" strait separating the modern day borders of Denmark and Sweden. The tolls constituted up to two thirds of Denmark's state income in the 16th a ...

' toll on international merchant ships passing through the

. Non-Danish vessels were restricted to the Øresund channel. Merchants paid the tax under threat of having their vessels sunk or confiscated. During the middle of the 19th century, this practice became a diplomatic liability and the Danish government agreed to terminate it, achieving an international financial compensation in return. Danish waterways were consequently opened to foreign shipping. The eastern half of the Great Belt is an

international waterway The terms international waters or transboundary waters apply where any of the following types of bodies of water (or their drainage basins) transcend international boundaries: oceans, large marine ecosystems, enclosed or semi-enclosed regiona ...

, legally based on the

1857 Copenhagen Convention The Sound Dues (or Sound Tolls; da, Øresundstolden) were a toll on the use of the Øresund, or "Sound" strait separating the modern day borders of Denmark and Sweden. The tolls constituted up to two thirds of Denmark's state income in the 16th a ...

. The western half of the Great Belt (between

and

) and all other parts of the

Danish straits The Danish straits are the straits connecting the Baltic Sea to the North Sea through the Kattegat and Skagerrak. Historically, the Danish straits were internal waterways of Denmark; however, following territorial losses, Øresund and Fehmarn Be ...

are Danish territorial waters and subject to Danish jurisdiction. In 1991,

Finland Finland ( fi, Suomi ; sv, Finland ), officially the Republic of Finland (; ), is a Nordic country in Northern Europe. It shares land borders with Sweden to the northwest, Norway to the north, and Russia to the east, with the Gulf of B ...

instituted proceedings before the

International Court of Justice The International Court of Justice (ICJ; french: Cour internationale de justice, links=no; ), sometimes known as the World Court, is one of the six principal organs of the United Nations (UN). It settles disputes between states in accordanc ...

against Denmark, which was planning to build a fixed traffic connection over the Great Belt (later

), including a bridge that Finland alleged would prevent the passage of certain ships to and from Finland: Finnish-built mobile offshore drilling units would be unable to pass beneath the bridge. The case was discontinued in 1992, before the Court had to rule on the merits, because Finland and Denmark reached a negotiated settlement. The two countries negotiated a financial compensation of 90 million Danish kroner, and Finland withdrew the lawsuit.

References

{{Authority control Straits of Denmark Straits of the Baltic Sea International Court of Justice cases

Geography

Geology

Biology

International waterway

See also

References